Studi Korosi Baja Galvanis Melalui Perlakuan Ekspos Di Lingkungan Perairan Sungai Cidaho - Sukabumi

*Ahmad Royani  -  Research Center for Metallurgy and Materials - Indonesian Institute of Sciences, Indonesia
Gadang Priyotomo  -  Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia, Indonesia
Hadi Gunawan  -  Pusat Penelitian dan Pengembangan Jalan dan Jembatan, Kementerian Pekerjaan Umum dan Perumahan Rakyat, Indonesia
Joko Triwardono  -  Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia, Indonesia
Lutviasari Nuraini  -  Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia, Indonesia
Siska Prifiharni  -  Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia, Indonesia
Heri Nugraha  -  Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia, Indonesia
Sugiarti Sugiarti  -  Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia, Indonesia
Sundjono Sundjono  -  Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia, Indonesia
Received: 7 Jul 2019; Revised: 5 Mar 2020; Accepted: 14 Apr 2020; Published: 31 May 2020.
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Section: Artikel
Language: ID
Statistics: 96 43
Abstract

Penelitian ini bertujuan untuk mempelajari korosi pada baja galvanis setelah diekspos di Sungai Cidaho Wilayah Sukabumi, Jawa Barat. Kehilangan berat baja galvanis diukur dengan metode pengurangan berat setelah diekspos untuk periode waktu tertentu di permukaan air sungai dan kedalaman air 1 meter. Morfologi permukaan dan komposisi produk korosinya dianalisismenggunakan Scanning Electron Microscopy (SEM) - Energy Dispersive Spectroscopy (EDS) dan X-Raya Diffraction (XRD). Setelah diekspos, seluruh permukaan baja galvanis tertutup oleh produk korosi. Hasil berat yang hilang dari baja galvanis setelah diekspos 76 hari adalah 1,37 mg/cm2 pada permukaan air sungai dan 7,83 mg/cm2 untuk kedalaman air 1 meter. Peningkatan kerusakan dari baja galvanis ini terjadi karena tidak terbentuk lapisan protektif akibat tergerus arus sungai. Produk korosi yang dominan pada baja galvanis yang diekspos pada kedalaman 1 meter adalah senyawa Zincite (ZnO). Hasil ini mengindikasikan bahwa penggunaan baja galvanis tidak cocok untuk lingkungan di kedalaman air

Keywords: Baja galvanis; Ekspos; Korosi; SEM-EDS; Senyawa Zincite; Sungai Cidaho; XRD

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